a 1/7=  15/ 105 b 5/6=  60/ 72 c 3/16=  18/ 96 d 11/15= 121/ 165

 [latex]a\ frac{1}{7}= frac{1*15}{7*15}= frac{15}{105}\\b\ frac{5}{6}= frac{5*12}{6*12}= frac{60}{72}\\c\ frac{3}{16}= frac{3*6}{16*6}= frac{18}{96}\\d\ frac{11}{15}= frac{11*11}{15*11}= frac{121}{165}[/latex]